Jig: The Great Irish Dance-Off9pm, BBC2

Brogan is 10 and from Derry. She is wholly dedicated to Irish dancing and is heading to the world championships for the first time. In New York, her biggest rival, 10-year-old Julia, is also gearing up for the competition. It's a lot of children furiously concentrating in massive wigs while rabid dance teachers fire verbal bullets at their feet. The dedication is total. And for all the discomfort of seeing children dressed as dolls, the final 10 minutes of this film are some of the most tense in cinematic history. Masterful. Julia Raeside

9/11: Day That Changed The World9pm, ITV1

With the 10th anniversary looming, there will be nearly as much of 11 September 2001 and its consequences on TV over the next few weeks as there was at the time. The strength of this film is that it focuses rigidly on the day itself. It recreates the chaos and terror of that dreadful Tuesday with chronologically arranged archive footage and recordings, illuminated by interviews with many of the key players, including Donald Rumsfeld, Dick Cheney, Richard Clarke, Laura Bush and Rudy Giuliani. A meticulous recreation of the 21st century's defining date. Andrew Mueller

The Killing9pm, Channel 4

As Linden and Holden discover why Rosie's teacher Bennet has been so shifty, the focus turns to Stan's assistant Belko, as they suddenly notice that, yes, he's a bit odd. If there's a pattern emerging here (shifty suspect comes under suspicion, only to be dismissed next week) it's worth remembering that the one-day-an-episode format means that we're still only 10 days into the case. Meanwhile, over on BBC4 at 10pm, original Killing detectives Lund and Meyer pursue a new lead. Richard Vine

The Story Of British Pathé9pm, BBC4

More priceless images from this wonderful series, "an intimate record of social change in Britain", tonight focusing on Pathé's "Pictorials" – shorter, more lighthearted films shown between the main features. Sexual politics and gender issues loom large, from the "problem" of "surplus" women after the first world war, all androgynous haircuts and athletics ("but somewhere in this wide world they still seek gracefulness"), to the reactionary moulds they were expected to fit in the 1950s and 60s: "Look at that beatnik girl … They'll make a gracious lady out of [her] yet." Glorious.

Ali Catterall

Russia's Toughest Prisons9pm, Nat Geographic

"There is only one way to leave this place … the cemetery." That's what you're letting yourself in for with Russia's Toughest Prisons. Three of Russia's most guarded institutions, which confine "maniacs, paedophiles and terrorists", open their doors for the first time, allowing us into the minds of the criminals, as well as revealing the strictly regimented routines carried out by guards in order to protect the inmates from each other, and themselves. Candice Carty-Williams

Lee Nelson's Well Good Show10.30pm, BBC3

Lee Nelson's Well Good Show, if nothing else, cannot be accused of lacking energy. Simon Brodkin commits himself unreservedly to his comic creation, bounding around in an exuberant, uninhibited blur. If only some of that energy could have been utilised in the writing. This episode, ostensibly on the theme of family, but in reality lacking anything approaching a form or structure, is characteristically lazy and unimaginative, forever opting for the cheap gag over something sharp and subversive, while Brodkin's attempts at improvised interaction with the audience fall horribly flat. Gwilym Mumford